Code Compare is a free compare tool designed to compare and merge differing files and folders. Code Compare integrates with all popular source control systems: TFS, SVN, Git, Mercurial, and Perforce. Code Compare is shipped both as a standalone file diff tool and a Visual Studio extension.
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
Beyond Compare - Beyond Compare allows you to compare files and folders.
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.
Araxis Merge - Home of the award-winning Araxis Merge two and three-way file comparison (diff) and merging application, Araxis Find Duplicate Files, Araxis Replace In Files, and the Araxis Ketura issue tracking, project scheduling and time tracking application.
Diff Checker - Diff Checker is a free online diff tool that quickly and easily gives you the text differences...
Compare - Download Notepad++ Compare plugin for free. Comparison plugin for Notepad++ editor. Comparison plugin for Notepad++ editor.